Question

4.) Find the accelerations (magnitude and direction) of each of the following systems. Show your work for credit. [That is at bare minimum: (i) draw appropriate free body diagrams; (ii) write down Newton's second law; (iii) solve the resulting equation(s) to find the acceleration.]

c.) A block of mass 10 kg hanging from a spring with spring constant ks= 1000 N / m that is attached to the roof of a moving elevator and is stretched 5 cm beyond its equilibrium length.

d.) a block of mass 10 kg that is being pulled north with a force of 20 Newton direction a an angle of 30° below the horizontal. The block is on a horizontal surface with coefficient of kinetic friction  μs = 0.2.

e.) A block of mass 10 kg that is being pulled north with a force of 30 Newton directed at an angle of 30° below the horizontal. The block is on a horizontal surface with coefficient of kinetic friction μk = 0.1 and coefficient of static friction μs = 0.2.

f.) Two 5 kg blocks connected by a rope with the easter-most block being pulled east by a horizontal force of 20 Newtons. The blocks are on a horizontal surface with coefficient of kinetic friction μk = 0.1 and the coefficient of static friction μs = 0.2.

Answer 1